{"id":73789,"date":"2020-03-12T08:42:49","date_gmt":"2020-03-12T05:42:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele"},"modified":"2020-03-12T08:42:49","modified_gmt":"2020-03-12T05:42:49","slug":"memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","title":{"rendered":"Memcached 1.6.0 — andmete vahem\u00e4lu s\u00fcsteem RAM-is, millel on v\u00f5imalus salvestada andmeid v\u00e4listesse seadmetesse","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"


\n \"Memcached<\/p>\n

<\/a><\/p>\n

8. m\u00e4rtsi seisuga toimus andmete vahem\u00e4lu s\u00fcsteemi v\u00e4rskendus. Memcached<\/strong> versioonini 1.6.0<\/strong>. Peamine erinevus eelmistest v\u00e4ljaannetest on see, et n\u00fc\u00fcd on v\u00f5imalik kasutada koos vahem\u00e4lu andmete hoidla jaoks v\u00e4list seadet.<\/p>\n

Memcached<\/strong> kasutatakse k\u00f5rge koormusega veebisaitide v\u00f5i veebirakenduste t\u00f6\u00f6 kiirendamiseks, v\u00f5imaldades juurdep\u00e4\u00e4su andmebaasile ja vaheandmetele.<\/p>\n

Uues versioonis on vaikimisi aktiveeritud parameeter extstore<\/strong>, mis on vastutav v\u00e4lise meedia kasutamise eest. Funktsiooni keelamiseks tuleks .\\\/configure-is m\u00e4\u00e4rata parameeter —disable-extstore. Kuid vaatamata vaikeseade aktiveerimisele tuleb k\u00e4ivitamisel selgelt n\u00e4idata selle funktsiooni kasutamist.<\/p>\n

Extstore<\/strong> v\u00f5imaldab kasutada v\u00e4list Flash<\/strong> v\u00f5i SSD<\/strong> m\u00e4luseadet vahem\u00e4lu suuruse suurendamiseks. See v\u00f5imaldab salvestada palju suuremat andmemahtu kui selle funktsiooni kasutamata j\u00e4tmisel.<\/p>\n

Veel \u00fcheks t\u00e4htsaks uuenduseks sai v\u00f5rguvahetuse \u00fcmberkujundamine, mis on n\u00fc\u00fcd kohandatud automaatseks pakettide t\u00f6\u00f6tlemiseks \u00fche s\u00fcsteemik\u00f5ne k\u00e4igus. Eelnevates versioonides edastati iga GET-p\u00e4ring eraldi paketina, kuid uues versioonis kogutakse vastused mitmele p\u00e4ringule kokku \u00fchte metapaketti ja edastatakse korraga. Selle uuenduse tulemusena v\u00e4henes CPU koormus 25% v\u00f5rra.<\/p>\n

Ka selle moderniseerimise tulemusena v\u00e4henes vahem\u00e4lu m\u00e4lu tarbimine — 4,5 Kb-lt 400-500 baidini kutsumise kohta, samuti v\u00e4henes malloc, realloc ja free funktsioonide kasutamine, mis t\u00f5i kaasa v\u00e4iksema m\u00e4lu killustatuse. Iga l\u00f5ng t\u00f6\u00f6tleb n\u00fc\u00fcd oma puhverdatud basseini lugemiseks ja kirjutamiseks aktiivsete \u00fchenduste jaoks. Nende puhverdamise suuruse seadmiseks on ette n\u00e4htud valikud -o resp_obj_mem_limit=N ja -o read_buf_mem_limit=N.<\/p>\n

Samuti kuulutati v\u00e4lja vana binaarprotokolli serveriga suhtlemise mberminek \u201evananenud\u201d kategooriasse. Selle asemel tuli meta-protokoll — tekstiline variant protokollist kompaktsete meta-k\u00e4skudega. Uues protokollis on arvestatud k\u00f5ikide varasemate operatsioonidega, mis kasutasid vana binaarprotokolli versioone.<\/p>\n

<\/p>\n

>>> Ametlik veebisait<\/a><\/p>\n

<\/noindex><\/noindex>
\n<\/p>\n

>>> Allika kood<\/a> (BSD litsents)<\/p>\n

<\/noindex>
\n<\/p>\n

>>> Extstore'i kirjeldus<\/a><\/p>\n

<\/noindex>
\n<\/p>\n

>>> meta-k\u00e4skude kirjeldus<\/a><\/p>\n

<\/noindex><\/p>\n

Allikas: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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